I use two different cameras. My phone camera and a Nikon Coolpix. So there are two different ways I edit my photos. In general I don't edit my photos much because I want to keep them as close to the original as possible. There are awesome filters out there you can use on your computer and/or on your phone but normally I like them for a few months and then I have enough of them.
Photos from my phone camera:
For my project life I use almost exlusively photos from my phone. I edit them directly on the phone with the app PicTapGo. It's easy, fast and has a lot of different options. For photos made in the daylight I mostly use Brightside to lighten them up a little bit. For photos made inside the house with lights on, I use Awake and Crispity. This way I can remove the orange touch of the photos you get from the light. But I try to avoid making photos with lights on because they are always worse than daylight photos.
Photos from my "big" camera:
For my blog I make all my photos with my Nikon Coolpix. And I edit them in Photoshop Elements 10. There are two different ways how I edit them.
When I make product photos inside my house how I described it here I only make them brighter and sometimes have to remove the blue touch.
To make the photo brighter: Enhance -> Adjust Lighting -> Shadows/Highlights or Brightness/Contrast
To remove a color touch: Enhance -> Adjust Color -> Remove Color Cast... Then you can click on the are where the color isn't right.
For photos made outside I use The Elements Collections by A Beautiful Mess. You get 10 different actions for Photoshop Elements and they are awesome. I mostly use Nico and decrease the Bright Boost around 50%
Please note, I ddidn't have any formal training in Photoshop Elements nor do I think this is the best and only way to edit your photos. It's just what works for me.